Examine source code of Pacman Persona

{
  "theme": {
    "images": {
      "theme_frame": "titlebar.png"
    },
    "colors": {
      "frame": "#fff717",
      "tab_background_text": "#cfcfcf"
    }
  },
  "version": "2.0",
  "name": "Pacman Persona",
  "manifest_version": 2,
  "description": "awesome"
}